Extra-warp motion for looms



y 1929- J. BRADLEYET AL EXTRA WARP MQTION FOR LOOMS Filed Dec, 20, 1927 2 Sheets-Sheet May 7, 1929. J. BRADLEY ET AL 1,711,583

EXTRA WARP MOTION FOR LOOMS Filed Dec. 2 1927 2 Sheets-Sheet 2 F'aq. 2,

Patented May 7, 1929 UNITED STATES,

* 1,711,583 PAT-ENT OFFICE.

JOI-ILI BRADLEY AND HARRY HARDY, OF MORLEY, ENGLAND.

EXTRA-WARP MOTION FOR LOOMS.

Application filed December 20, 1927,'Seria1' No. 241,402, and in Great Britain November 2, 1927.

This invention relates to extra warp motions for looms, and is more particularly suitable for such cloths as cotton warp, woolen weft, single shuttle goods, but is also applicable in the production of any type of fabric comprising warp and weft; and has for its object the introduction of extra warp or warps into the woven fabric, at any desired ratio to the ground warp, by mechanism or means operated and governed primarily by the said ground warp, whereby it is possible to introduce into goods woven in plain looms, various novel effects in the pattern or design, hitherto only obtainable in the dobby, J acquard, or multiple shuttle loom.

We attain these objects by the means illustrated in the accompanying drawings, in which:

Fig. 1 is a side elevation of part of a plain loom with the invention applied.

Fig. 2 is a back view of Fig. 1.

Referring to the drawings :Suitably situated relative to the ground warp beam A is mounted in bearings in the loom frame B, 5 preferably a suitable cloth covered roller C,

or a roller provided with a suitable gripping surface thereon. The shaft or trunnions D or the roller C has keyed or otherwise secured thereon a sprocket wheel E, connected by a. chain F with a further sprocket wheel G, preferably of a different ratio to the wheel E, secured to the shaft H of one of the drawrollers J, J, of the extra warp or wraps K. L, L, are intermeshing pinion wheels of corresponding size and pitch for rotating the rollers J, J, delivering the warp K from the beam M to the fell of the cloth in the well known manner, and N is the back rail over which the said extra warp or warps K passes or pass to the fell of said cloth. P is the back rail acting in a similar capacity with reference to the ground warp R.

, The ground warp or warps R passesor pass from the beam orbcams A to and over the roller C aforesaid, in a manner providing a sufficiently large arc of contact, for example, preferably not less than to impart motion thereto, which is transmitted to the sprocket wheel E; the warp subsequently passing over the rail P and direct to the fell of the cloth, as indicated by arrows. The extra warp or warps K pass from the beam or beams M under and over the rollers J, J, over the rail N and direct to the fell of the cloth, as is also indicated by arrows.

It will be obvious that the sprocket wheels or gears E, G, being of a different ratio, for example, the wheel G beingten per cent less than the wheel E, and the wheel G being driven by the chainF operated primarily by the ground warp, the amount of extra warp or warps delivered to the fell of the cloth is correspondingly in excess of the delivery of the ground warp, and produces a different or desired effect in the fabric being woven.

What we claim as our invention, and desire to secure by Letters Patent, is

1. In a loom, the combination of a ground warp beam, a roller having frictional engagement with and adapted to be rotated by ground warps drawn over it from said beam, an extra warp beam, a pair of draw rollers for drawing extra warps from the last said beam, and means c mnectingthe roller driven by the ground warps with one of extra warp draw rollers whereby the feed of the extra warps may be in excess of that of the ground warp.

2. In a loom, the combination of aground warp beam, a roller having frictional engagement with and adapted to be rotated by ground warps drawn over it from said beam, an extra warp beam, a pair of draw rollers for drawing extra warps from the last said beam, two different sized sprockets connected, respectively, to the aforesaid ground warp driven roller and one of the extra warp'draw rollers, and a chain connecting said sprockets, whereby the speed of the feed of the extra warps will be directly controlled by the feed of the ground warps and the two sets of warps may have different speeds.

3. In a loom, the combination of a ground warp beam, a roller having a suitable friction surface engaging the ground warp as the latter is drawn thereover, whereby said roller is rotated at a speed determined by the movement of the warp, an extra warp beam, a pair of rollers geared together and adapted when rotated to draw extra warp from the last said beam, and means for driving one of said extra warp feed rolls from the said friction surfaced roller engaged by the ground warp.

In witness whereof we affix our signatures.

JOHN BRADLEY. HARRY HARDY. 

